The United States will present a new military action in Syria if the regime of President Bashar al-Assad reaches for chemical weapons again, warned Washington on Monday and announced that last week they destroyed 20 percent of the aircraft of Assad's army. President Donald Trump is ready to make new attacks on Syria if the government of that country re-uses chemical weapons or the barrel bombs, warned the White House. "It is certain that we are open for future action if we see people being suffocated by gas and blown barrels bombs again," said the White House spokesman Sean Spicer.

"If gas chokes a child, or if barrel bombs go on innocent people ... you will see the president's response," he said.

Barrel bombs are containers for oil or cylinders filled with explosives and shrapnel.

Last week Trump ordered the attack with cruise missiles at military base Sajrat in response to a chemical attack carried out earlier this week which killed dozens of civilians, including many children. Trump is holding Assad's regime responsible for the attack, but Assad denies it.

"President intends to work against the Assad regime in Syria whenever it is in the national interest, and that was decided after the government used chemical weapons against its own citizens," said Spicer.

Theresa May talked to Trump

British Prime Minister Theresa May agreed in a telephone conversation with US President Donald Trump that it is still possible to convince Russia to sever ties with Syrian President Bashar al-Assad, announced the British government's office. "The Prime Minister and the President agreed that there is room to convince Russia that the alliance with Assad is no longer in its strategic interest," said spokeswoman of Theresa May.

She added that they agreed that the visit of US Secretary of State Rex Tillerson to the Moscow this week gives the possibility of progress towards a solution that will bring a lasting political agreement.

Tillerson travels to Moscow

Trump and German Chancellor Angela Merkel, with whom the US president also spoke by phone on Monday, agreed that the visit is an opportunity to make progress toward a solution.

A spokeswoman also said that Trump and May stressed the importance that the international community, including China, puts the pressure on North Korea to limit the danger it represents. A spokeswoman of Theresa May said that Trump thanked May and Merkel for their support after last week's US attack on a Syrian military base.

The Syrian government denies it was behind the attack with chemical weapons in Khan Sejkun. The White House said in a statement that May and Merkel gave support to the US action and agreed with Trump that Assad is responsible for the attack with chemical weapons. The Pentagon on Monday emphasized that the attack destroyed 20 percent of the Syrian Air Force.